The vital elements for a living room in Ancient Chinese style are:

1. Natural Materials: Ancient Chinese style heavily emphasizes the use of natural materials, such as wood and bamboo, for furniture and decorations. The choice of these materials reflects the Chinese philosophy of living in harmony with nature. The texture and color of these materials also add warmth and tranquility to the interior space.
2. Balance and Symmetry: Balance and symmetry are core principles in Chinese design. Furniture and decor should be arranged in a way that creates harmony and balance. This isn’t just about physical balance, but also conceptual balance between yin and yang, the two opposing yet complementary forces in Chinese philosophy.
3. Minimalism: Unlike some other styles, Ancient Chinese decor is not about clutter or extravagance. Instead, it focuses on the beauty of each individual piece. Each item in the room has a purpose and is thoughtfully placed to contribute to the overall aesthetic and function of the room.
4. Color Scheme: The color scheme in Ancient Chinese style is often muted, with browns, blacks, whites, and sometimes reds being predominant. These colors are derived from natural elements and are used to create a calm and soothing environment.
5. Artwork and Calligraphy: Ancient Chinese style often includes traditional Chinese artwork or calligraphy. These are not just decorative elements, but also a reflection of the intellectual and spiritual pursuits of the inhabitants. They are often hung on the wall or displayed on shelves, serving as focal points in the room.
6. Screens: Screens are a key feature in Ancient Chinese style. They are often used to separate different areas of a room or to provide privacy. Screens can be both functional and decorative, with many showcasing intricate designs or scenes from nature or mythology.

These elements combine to create a living space that is not only visually appealing, but also deeply rooted in ancient Chinese philosophy and aesthetics.